Pipe-wrench



(No Model.)

M. T. CHAPMAN.

PIPE WRENCH. No. 254,460. Patented Mar. 7,1882.

fi l H c Fifi) egg Q UNITED STATES PATENT QFFICE.

MATTHEW T. CHAPMAN, OF'AURORA, ILLINOIS.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 254,460, dated March 7,1882.

Application filed December 8, 1880. (No model.)

To all whom it may concern:

Be it known that I, MATTHEW T. CHAPMQN, residing at Aurora, in thecounty of Kane and State of Illinois, and a citizen of the UnitedStates, have invented a new and useful Improvement in Pipe-Wrenches, ofwhich the following is a full description, reference being had to theaccompanying drawings, in which Figure l'is a top view. Fig. 2 is a sideelevation. Fig. 3-is a bottom view, showing also a coupling. Fig.4 is abottom view, showing the chains twice around the pipe. Fig. 5 shows avariation.

This invention relates to improvements in devices for rotating ironpipes and couplings; and it consists in the combination, with the leverin a pipe-wrench, of two independent chains, secured one on each side ofthe griping end of the lever by means of a common bolt, and pinsprojecting in pairs from opposite sides of the lever at a point in rearof said bolt, as hereinafter described, and particularly pointed out inthe claim.

In the drawings, A represents a lever, the end a. of which is serrated,or this end of the lever may be roughened or pointed in any suitablemanner.

B 0 represent two chains, which are secured, one on each side of thelever, near the front end, by means of a single bolt, 11, passingthrough the lever and chains, which bolt can be easily removed if itbecomes necessary to repair or replace the chains.

0 c are two pins which pass through the lever and project on each sidethereof. These pins are located at a suitable distance back of the pointof attachment of the chains. They are a little distance from each other,and are secured firmly in the lever.

D is a piece of pipe.

0 is a coupling.

- In use the end a of the lever is placed on the pipe or coupling to beturned, and the chains are drawn around under the pipe and are secured,one on each side of the lever, by passing them between the pins 0 c, asshown in Figs. 1, 2. Then by raising the lever the pipe or coupling willbe firmly grasped and can be turned.

If desired, an eye, 11, can be connected with the pins 0 c, as shown inFig. 5, through which eye the chain can pass. In such case the pinscannot pass through the lever, but an eye, with 7 its pins, must be usedon each side.

The described construction has advantages over a device which has asingle chain, or a double chain part way, connected to the lever at somedistance from the end, between the two parts of which chains the end ofthe lever is located, among which I mention the following: By using twochains connected to the lever near its front end the chains can betwisted together when a short coupling or pipe is to be rotated, thusfor the time being forming a single chain, in effect, which can bepassed over such coupling or short pipe, as seen in Fig. 3. If the leverwere made to pass between two chains connected some distance from thefront end of such lever, this could not be done. By having two chainsthere is less danger of injuring the pipe, as there is morechain-surface. The two chains, located as described, have a tendency tokeep the lever in a straight line, and the strain on the two chains willbe nearly uniform.

Sometimes it is desirable to protect the pipe'from being marred. Byusing two chains arranged as described the pipe can be protected by apiece of copper, leather, or other suitable material placed under thelever, and the chains can be wound twice around the pipe, as shown inFig. 4, and then they will not slip thereon while the same is beingturned.

It is sometimes desirable to rotate a pipe and a coupling of differentdiameters. By using two chains one of them can be placed around thepipe, the other around the coup ling, and the two chains thus arrangedwill operate together.

I am aware that a patent has been granted to Eugene H. Robbins for animprovement in pipe-wrenches, dated May 2, 1871, and I do not claim thedevice therein shown.

What I claim as new, and desire to secure by Letters Patent, is asfollows:

The combination, with the lever A in a pipe-wrench, of the twoindependent chains se-- cured one on each side of the griping end of thelever by means of a common bolt, and the pins 0 c,projecting in pairsfrom opposite sides of the lever at a point in rear of said bolt, asherein shown and described, and for the purposes specified.

E. A. WEST, o. w. BOND.

